package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFAnchor;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import javax.xml.namespace.QName;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.*;
import java.util.stream.Collectors;

@Service
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;


    /*
    * 营业额统计
    * */
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        //封装数据原型
        List<LocalDate> dateList = new ArrayList<>();
        List<Double> turnoverList = new ArrayList<>();

        dateList.add(begin);
        while (!begin.equals(end)){
            //日期设置
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover = orderMapper.sumByMap(map);
            turnover =  turnover == null ? 0.0 : turnover;

            turnoverList.add(turnover);
        }


        //封装返回结果
        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
    }

    /*
    * 用户统计
    * */
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();

        dateList.add(begin);
        while (!begin.equals(end)){
            //日期设置
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        //存放每天新增用户数量
        List<Integer> newUserList = new ArrayList<>();
        //存放每天的总用户量
        List<Integer> totalUserList = new ArrayList<>();

        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap();
            map.put("end",endTime);

            //统计总用户量
            Integer totalUser = userMapper.countByMap(map);
            //totalUserList = totalUser == null ? 0 : totalUser;
            totalUserList.add(totalUser);

            //新增用户量
            map.put("begin",beginTime);
            Integer newUser = userMapper.countByMap(map);
            newUserList.add(newUser);
        }

        //封装结果数据
        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .totalUserList(StringUtils.join(newUserList,","))
                .build();
    }

    /**
     * 订单统计
     * @param begin
     * @param end
     * @return
     */
    public OrderReportVO getOrdersStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();

        dateList.add(begin);
        while (!begin.equals(end)){
            //日期设置
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        //存放每天的订单数
        List<Integer> ordersCountList = new ArrayList<>();
        //存放每天完成的订单数
        List<Integer> validOrdersCountList = new ArrayList<>();

        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            //每天的订单数
            Integer ordersCount = getOrdersCount(beginTime, endTime, null);
            ordersCountList.add(ordersCount);

            //每天完成的订单数
            Integer validOrders = getOrdersCount(beginTime, endTime, Orders.COMPLETED);
            validOrdersCountList.add(validOrders);

        }

        //计算时间区域内的订单总数
        Integer totalOrderCount = ordersCountList.stream().reduce(Integer::sum).get();

        //计算时间区域内的完成订单总数
        Integer validOrdersCount = validOrdersCountList.stream().reduce(Integer::sum).get();

        //订单完成率
        Double orderCompletionRate = 0.0;
        if(validOrdersCount != 0){
            orderCompletionRate = validOrdersCount.doubleValue() / totalOrderCount;
        }


        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(ordersCountList,","))
                .validOrderCountList(StringUtils.join(validOrdersCountList,","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrdersCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    private Integer getOrdersCount(LocalDateTime begin,LocalDateTime end,Integer status){
        Map map = new HashMap();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status",status);

        return orderMapper.countByMap(map);
    }

    /*
    * 销量前10统计
    * */
    public SalesTop10ReportVO getSaleTop10(LocalDate begin, LocalDate end) {

        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);

        List<String> nameList = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String names = StringUtils.join(nameList,",");

        List<Integer> numberList = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numbers = StringUtils.join(numberList,",");

        return SalesTop10ReportVO.builder()
                .numberList(numbers)
                .nameList(names)
                .build();
    }

    /**
     * 导出运营数据表
     * @param response
     */
    public void exportBusinessDate(HttpServletResponse response) {
        //1.查询数据库，获取营业数据--查询最近30天的运营数据
        LocalDate dateBegin = LocalDate.now();
        LocalDate dateEnd =LocalDate.now();


        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

        //2.通过POI将数据写入到Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            //基于模板文件创建一个新的Excel文件
            XSSFWorkbook excel = new XSSFWorkbook(in);

            //获取表格文件中的Sheet页
            XSSFSheet sheet = excel.getSheet("sheet1");

            //填空时间数据
            sheet.getRow(1).getCell(1).setCellValue("时间："+dateBegin + "至" + dateEnd);

            //获取第四行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            //获取第四行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            //填充明细表
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //查询某一天的营业数据
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

                //获取某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());

            }

            //3.通过输出流将Excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();

        } catch (IOException e) {
            e.printStackTrace();
        }


    }
}
